| 21. | For example, at optical frequencies, plasmons can couple with a photon to create another quasiparticle called a plasmon polariton.
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| 22. | One undesirable effect of angle tuning is that the optical frequencies involved do not propagate collinearly with each other.
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| 23. | Such systems also have the important advantage of very narrow channel spacing in optical frequency-division multiplexing ( OFDM ) systems.
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| 24. | However, since energy detection is inherently " square-law " detection, it intrinsically mixes any optical frequencies present on the detector.
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| 25. | For example, in " Fall ", a single perpendiculars curve is repeated to create a field of varying optical frequencies.
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| 26. | Optical frequency multipliers are very common in high-power lasers, notably those used for inertial confinement fusion ( ICF ) experiments.
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| 27. | Surface plasmons occur at optical frequencies, but at microwave frequencies, they are the normal currents that occur on any electrical conductor.
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| 28. | We have not even begun to tap the applications at microwave frequencies, let alone what may lie ahead at optical frequencies,
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| 29. | Below optical frequencies ( that is, at microwave and radio frequencies ), the spectrum analyzer is a closely related electronic device.
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| 30. | Kinetic inductance is therefore only significant at optical frequencies and in superconductors, where { \ tau \ rightarrow \ infty }.
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